You can easily make any filter specific to your need of the moment based on precise fields in the data. Once made, a filter can be used indefinitely on any report. A filter limits the data which appear on reports. After you name a filter, you can set a limitation(s) which focuses on a specific subset of data. Most often you can set enough criteria when running a report so that you do not even need a filter.
There are two steps to creating a filter:
To get any report on only certain stations, make a filter selecting those stations. Then use that filter when you run a report.
When you run the report, in the Filter field where it says All Records choose the new filter on the Selected Stations. Set the date range, too, before you preview the report.